today, the brown paper bag test. she stops each child entering the classroom and compares their skin tone to a paper bag. >> let me see your arm. can you put your arm out for me? okay. you got to sit in the back. >> lighter than the bag, you can sit in the front. it's a real test from the early 1900s. used by social organizations like churches and fraternities and neighborhood groups to decide who was light skinned enough to join. >> was it too extreme to do to little kids? >> the more shocking the activity is the better because it's going to stick with them. >> why are you all feeling bad? >> she showed us that dark skin had to sit in the back and light skin had to sit in the front. i didn't think it was fair. >> it's an eye-opening report. "who is black in america" airs on cnn this sunday, 8:00 p.m. eastern and pacific. >>> kyung lah is back with another "360 bulletin." >>> new violent protests in egypt aimed at president morsi. they broke through barricades protecting the presidential palace while demonstrators ou